Abstract: An artificial reef structure is provided with units each including an intermediate artificial kelp; an upper buoyant body including a buoyant drum at one side and having snap members, and a first pressing plate at an other side and having first and second holes wherein the snap members are inserted through the artificial kelp and the second holes to fasten the buoyant drum, the artificial kelp, and the first pressing plate together; and a lower support including a second pressing plate at one side and having second snap members and a bottom hook, and a third pressing plate at an other side and having third and fourth holes wherein the second snap members are inserted through the intermediate artificial kelp and the fourth holes to fasten the second pressing plate, the artificial kelp, and the third pressing plate together; and an anchor including rings each secured to the hook.